TWI607807B - Spray paint washing device - Google Patents

Description

Paint washing machine

The invention relates to the technical field of paint spraying, and in particular to a paint washing device.

A coating is a kind of liquid or solid material applied to the surface of an object to form a film under certain conditions to protect, decorate or other special functions (insulation, rust prevention, mildew resistance, heat resistance, etc.). The coating is applied in people's daily life. It is very extensive. Taking paint as an example, the paint is resistant to water, oil, and dry. It is often used to spray wood, such as tables, stools, and plates. During the spraying process of the paint, it is required to be accompanied by the flow of water in order to adsorb and receive the excess paint, to avoid excessive paint spray and to pollute the surrounding environment. However, this method is relatively expensive for water resources, relatively wasteful, and also produces a large amount of sewage, and the adsorption effect on excess paint is still poor.

In view of this, the present invention provides a paint washing device to improve the water consumption of the paint spraying process, the sewage is generated more, and the adsorption effect on the excess paint is also poor.

In order to achieve the above object, the present invention provides the following technical solution: a paint washing device, including a sink, a water pump, a workbench, a pool, and an outer Shell baffle. The water pool and the outer casing baffle together constitute a spray booth, the workbench is disposed above the water tank, the water tank is disposed above the workbench, and the water tank is provided to facilitate water flow to the water tank An opening, the water tank is in communication with an output end of the water pump, and an input end of the water pump is in communication with the pool.

Preferably, in the above-mentioned paint washing device, the spray booth is further provided with a water curtain plate, and the water curtain plate is connected with the opening for guiding the water flow to form a water flow surface. The water curtain is used to guide the water flow so that the water flowing out of the water tank forms a surface on the water curtain panel, that is, the water flow surface. In this way, the overall area of the water flow falling process can be enlarged, so that a large area of water flow adsorbs more paint, which greatly reduces the diffusion rate of the mist paint.

Preferably, in the above-mentioned paint washing device, the water curtain plate is a curved water curtain plate, and the water curtain plate is convex toward the table. The water curtain plate is arranged in an arc shape, and it is convex toward the table, that is, the water curtain plate is convex toward the position in which the worker operates. In this way, when the water flows down from the water tank, it can be well fitted with the water curtain plate, and along the water curtain plate, an arc-shaped water flow surface is also formed, and the water flow surface is also convex toward the table. Therefore, the water flow end of the water curtain plate near the end of the water pool can be separated from the worktable, thereby effectively preventing the water from flowing into the pool. The splashing water or the formed water mist affects the staff at the workbench. Painting operation.

Preferably, in the above-mentioned paint washing device, the water curtain plate divides the spray booth into a working chamber and a back chamber, the working chamber is in communication with the screen back chamber, and the working table is located in the working chamber. The back chamber is provided with an exhaust fan. The water curtain panel divides the spray booth, part of the space is the studio, the other part is the back room, and the work table is set in the studio, so the water curtain is convex toward the studio. The back chamber has an exhaust fan. Thus, when the water flows down from the water curtain plate, the air blower of the curtain back chamber can change the direction of the water flow through the generated air flow, so that the water flow flows to the back chamber as far as possible, away from work. The operating position of the person. Exhaust fan The installation can not only absorb part of the spray paint emitted from the air, but also make the paint around the workbench sucked into the direction of the water curtain plate, and then be adsorbed by the water flow, into the water, so that the air is purified, and also can attract water to the curtain. The back chamber flows away from the workbench to avoid adverse effects of water flow on the device.

Preferably, in the painting water washing device, the spray booth is further provided with a plurality of nozzles, and the plurality of nozzles communicate with the output end of the water pump through a pipe. A plurality of nozzles communicate with the output end of the water pump, and the water flow recovered from the pool is used to increase the area of the water flow for adsorbing the mist paint, and the adsorption intensity of the paint in the air is increased.

Preferably, in the above-mentioned painting water washing device, the water spray ports of the plurality of nozzles are all directed toward the water pool. The nozzle's spout faces the pool, reducing the possibility of water flowing into the pool and splashing or creating a mist.

Preferably, in the above-mentioned paint washing device, the nozzles are all fan-shaped nozzles. The fan nozzle has a flow guiding plane, and the water jetted by the fan nozzle can form a relatively stable water flow surface.

Preferably, in the above-mentioned paint washing device, a plurality of the fan-shaped nozzles are disposed on the rear side of the painting booth, a plurality of the fan-shaped nozzles are sequentially arranged, and a water flow surface formed by water of a plurality of fan-shaped nozzles and water flowing down the water tank The formed water flow faces intersect. The water jets from the fan nozzles flow from the water flow surface with a smaller area, and the water jets from the plurality of fan nozzles together form a larger water flow plane, which intersects the water flow plane of the water tank, which is equivalent to the intersection of the two surfaces. The faces intersect to form a concave water curtain wall, which is tightly sealed on the opposite side of the staff's operating position to absorb the spray paint.

Preferably, in the above-mentioned paint washing device, the pool is provided with a filter for filtering water entering the water pump. The filter can filter the impurities in the pool with large particle size, avoiding the impurities entering the inlet of the pump and blocking the inlet of the water stream, and also avoiding the entry of impurities. Possible damage to the pump.

Preferably, in the above-mentioned paint washing device, the connection between the input end of the water pump and the pool is set as a water inlet of the water pump, and the paint washing device further includes a return pipe, and one end of the return pipe and the output end of the water pump The other end is a free end, and the other end of the nozzle is disposed above the water inlet of the water pump for flushing impurities from the water inlet of the water pump. The nozzle of the return pipe is aligned with the outer edge of the water inlet of the water pump, and the water flow recovered by the water pump is used to flush the outer edge of the water inlet of the water pump to avoid impurities and oil particles with small particle size entering the water pump, thereby avoiding the blockage of the water pump.

Compared with the prior art, the present invention includes the following beneficial effects: the paint washing device provided by the present invention forms a water flow circuit through a pool, a water pump and a water tank, so that the water in the pool can be utilized by the loop and flow out from the water tank. When the worker paints the device on the workbench, the compressed air takes the paint out and pushes it to form a mist paint. The spray paint will be sprayed on the device. At this time, some of the spray paint will be emitted. In the air, it pollutes the surrounding space. Since there is water flowing out of the water tank, when the mist paint is dispersed to the water flow, it will be adsorbed by the water flow, thereby avoiding the intentional emission of the mist paint, and also protecting the surrounding space and the appliance. After the adsorption of the spray paint, the water flow will fall in the pool. Then, the water pump recycles the water in the pool, flows into the water tank again through the output end of the water pump, and then falls to the pool to adsorb the paint in the air to reduce the air. The paint content in the air purifies the air and reduces the pollution to the surrounding space. The loop setting of the paint washing device can repeatedly utilize water resources, consumes small water resources, and greatly reduces the generation of sewage, has good adsorption effect on the spray paint in the air, and has high practicability, and is suitable for wide-ranging promotion. .

101‧‧‧Sink

102‧‧‧Water pump

103‧‧‧Workbench

104‧‧‧ pool

105‧‧‧Shell baffle

106‧‧‧Water curtain

107‧‧‧Exhaust fan

108‧‧‧Nozzles

109‧‧‧Filter

110‧‧‧ return pipe

In order to more clearly illustrate the technical aspects in the embodiments of the present invention or the prior art. BRIEF DESCRIPTION OF THE DRAWINGS The accompanying drawings, which are set forth in the drawings in the claims In other words, other drawings can be obtained based on these drawings without paying progressive labor.

1 is a schematic view of a paint washing machine according to a first embodiment of the present invention; FIG. 2 is a schematic view of a paint washing machine according to a second embodiment of the present invention; 4 is a right side view of the paint washing machine provided in the second embodiment of the present invention.

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is a partial embodiment of the invention, and not all of the embodiments. The elements of the embodiments of the invention, which are generally described and illustrated in the figures herein, may be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the invention in the claims All other embodiments obtained by a person of ordinary skill in the art based on the embodiments of the present invention without departing from the scope of the present invention are within the scope of the invention.

It should be noted that similar reference numerals and letters indicate similar items in the following figures. Therefore, once an item is defined in a drawing, it is not necessary to further define and explain it in the subsequent figures.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inside", "outside", etc. are indicated. Orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship that is conventionally placed when the invention product is used, for the convenience of describing the present invention and simplifying the description, rather than indicating or implying The device or component referred to must have a particular orientation, is constructed and operated in a particular orientation, and thus is not to be construed as limiting the invention. Moreover, the terms "first", "second", "third", and the like are used merely to distinguish a description, and are not to be construed as indicating or implying a relative importance.

In the description of the present invention, it should be noted that the terms "set", "install", "connected", and "connected" are to be understood broadly, and may be fixed connections, for example, unless otherwise specifically defined and defined. It can also be a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and can be internal communication between the two elements. The specific meaning of the above terms in the present invention can be understood in a specific case for those having ordinary skill in the art.

Embodiment 1

1 and 2 illustrate a painting water washing apparatus according to a first embodiment of the present invention, which includes a water tank 101, a water pump 102, a table 103, a pool 104, and a casing baffle 105. The water tank 104 and the outer casing baffle 105 together constitute a spray booth, the work table 103 is disposed above the water pool 104, the water tank 101 is disposed above the work table 103, and the water tank 101 is provided with an opening for facilitating the flow of water to the water pool 104, the water tank 101 and the water pump 102. The output is connected and the input of the water pump 102 is in communication with the pool 104.

In this embodiment, the water tank 101 is a rectangular parallelepiped water tank, and the water tank 101 is provided. Placed inside the spray booth, the opening in the water tank 101 is an elongated opening, the length of the opening is similar to the length of the water tank 101, so that the water in the water tank 101 flows down through the elongated opening, and can be a water curtain. Shape, with a large water flow area. Of course, such selection is not limited. Other shapes of the water tank 101 may be used, such as a square shape, and the water tank 101 may be disposed outside the spray booth, and the length of the opening may be set to only half of the length of the water tank 101. For convenience of explanation, in the following embodiments, a rectangular parallelepiped water tank is used, and the length of the opening in the water tank 101 is equal to the length of the water tank 101.

In fact, the spray booth is like a tipped box, except that the end of the box's opening is not facing up. One of the sides of the spray booth has an open side, which is where the worker operates. Based on the operator's operating position, the front side of the spray booth is the opposite side, and the opposite side is the rear side of the spray booth. The pool 104 is located at the bottom side of the spray booth, and the opposite side is the top side. The top, left and right sides, and rear side of the spray booth are covered by the outer casing baffle 105, and the front side is the open surface, that is, the working position of the worker. In the present embodiment, the water tank 101 and the table 103 are installed in the painting booth, and the water pump 102 is disposed outside the painting booth. The table 103 is supported above the pool 104 by a column, and the water tank 101 is disposed above the table 103, but not directly above, but near the rear side of the painting booth, and the water tank 101 is merely positioned above the table 103. The output of the external water pump 102 communicates with the interior of the water tank 101 through a tube which is placed at the top of the spray booth, and the water tank 101 is suspended above the table 103 by the force of the tube. The input of the water pump 102 is also in communication with the pool 104 through a tube, and the water in the pool 104 can flow into the water pump 102, which in turn flows to the water tank 101 and falls through the water tank 101 to the pool 104.

In the painting water washing apparatus, a water flow circuit is formed by the pool 104, the water pump 102, and the water tank 101, so that the water in the water pool 104 can be utilized by the loop and flows out of the water tank 101. When the worker performs the painting operation on the working table 103, the painting device compresses the air through the lacquered container, and takes the paint out at the oil outlet using the wind flow speed to advance it. A fog-like lacquer is formed and sprayed on the device by means of a mist lacquer. At this time, some of the lacquer adheres to the surface of the device, and some of the lacquer lacquer is emitted in the air, causing pollution to the surrounding space. Since the water flows out of the water tank 101, when the mist paint is dispersed to the water flow, it will be adsorbed by the water flow, thereby avoiding the intentional emission of the mist paint, and also protecting the surrounding space and the appliance. The water flow after the adsorption of the lacquer will fall in the pool 104, and then the water pump 102 recycles the water in the pool 104, flows into the water tank 101 again through the output of the water pump 102, and then falls to the pool 104, in the air. Spray paint for adsorption, reduce the amount of paint in the air, purify the air, reduce pollution to the surrounding space, and so on. The loop setting of the paint washing device can repeatedly utilize water resources, consumes small water resources, and greatly reduces the generation of sewage, has good adsorption effect on the spray paint in the air, and has high practicability, and is suitable for wide-ranging promotion. .

Embodiment 2

3 and 4 illustrate a painting water washing apparatus according to a second embodiment of the present invention, which includes a rectangular parallelepiped water tank 101, a water pump 102, a table 103, a pool 104, and a casing baffle 105. The water pool 104 and the outer casing baffle 105 together constitute a spray booth; the water tank 101 is provided with an opening, the length of the opening is equal to the length of the water tank 101; the spray paint chamber is further provided with a water curtain plate 106, and the water curtain plate 106 is connected with the opening for guiding the water flow. Form a water flow surface. The water flow is guided by the water curtain plate 106 such that the water flowing out of the water tank 101 forms a face on the water curtain plate 106, that is, a water flow surface. In this way, the overall area of the water flow falling process can be enlarged, so that a large area of water flow adsorbs more paint, which greatly reduces the diffusion rate of the mist paint.

In this embodiment, the water tank 101 is disposed at the top of the outer side of the spray booth, and both ends of the water tank 101 are erected on the outer casing baffle 105. The water tank 101 is high and low, and the water tank 101 is an open trough body, and the top surface thereof is square. Face. The water pump 102 is disposed on the right side of the outdoor side of the paint spray, and the water pump 102 communicates with the inner cavity of the water tank 101 through the pipe. Since the top surface of the water tank 101 is open, the pipe and the water tank 101 are not actually connected, but the pipe is disposed above the water tank 101. . The pipe mentioned here comprises two pipes, the first pipe is in communication with the water pump 102, and the second pipe is connected to the first pipe, the two pipes are in an inverted "T" shape, in the vertical direction It is the first pipe, and the horizontal pipe is the second pipe, and the second pipe is parallel to the water tank 101, and both ends are closed. The first pipe is connected to the middle of one side of the second pipe, and the other side of the second pipe (ie, the side close to the water tank 101) is provided with a plurality of through holes, and the water of the water pump 102 passes through the first The tubes are conveyed to the second tube and flow from these through holes to the water tank 101. In this way, the shunting function is adopted to prevent the water of the first pipe from directly rushing into the water tank 101, and the water in the water tank 101 is unevenly distributed, and the water falling on the water curtain plate 106 is unevenly distributed, and the water curtain cannot be formed. . The table 103 and the water curtain plate 106 are disposed inside the spray booth. Based on the operator's operating position, the front side of the spray booth is the opposite side, and the opposite side is the rear side of the spray booth. The pool 104 is located at the bottom side of the spray booth, and the opposite side is the top side. The worktable 103 is placed above the pool 104 by stainless steel, and the water tank 101 is disposed above the worktable 103, but not directly above, but close to the rear side of the spray booth, and the water tank 101 is only located above the worktable 103. A level adjuster is also provided at the water tank 101 to adjust the water tank 101 to maintain the level.

In this embodiment, the water curtain board 106 is a stainless steel water curtain board. Of course, this selection is not limited, and other water curtain boards 106, such as wooden water curtain boards, may also be used. The length of the water curtain plate 106 is also equal to the length of the water tank 101. One side of the water curtain plate 106 is connected to the opening of the water tank 101, the water flow flows down from the water curtain plate 106, and the other side of the water curtain plate 106 is not connected to the water pool 104. Instead, it is suspended and kept at a distance of 10 cm from the water surface of the pool 104.

The water curtain plate 106 is a curved water curtain plate, and the water curtain plate 106 is convex toward the table 103. The water curtain plate 106 is arranged in an arc shape, and it is convex toward the table 103, that is, the water curtain plate 106 is convex toward the front side of the spray booth. In this way, when the water flow falls out from the water tank 101, it can be well fitted with the water curtain plate 106, and along the water curtain plate 106, an arc-shaped water flow surface is also formed, which also faces the table 103. The direction is raised, so The water flow end of the water curtain plate 106 near the end of the pool 104 can be separated from the table 103, thereby effectively preventing the water from flowing into the pool 104. The splashing water or the formed water mist affects the staff. Painting operation of the table 103.

In addition, the water curtain board 106 also divides the spray booth into a working chamber and a back chamber, and since the water curtain 106 is suspended above the pool 104 and is kept at a distance of 10 cm from the water surface, the studio and the back chamber are still connected. The workbench 103 is located in the studio, and the exhaust chamber 107 is provided with an exhaust fan 107. The water curtain board 106 divides the spray booth, a part of the space is a working chamber, the working chamber is closer to the front side of the spray booth, the other part is the back room, the back room is closer to the back side of the spray booth, and the work table 103 is set at work. The water curtain plate 106 is convex toward the direction of the working chamber. The top of the curtain back chamber (ie, at the top of the outer casing baffle 105) is provided with a duct having an exhaust fan 107, and the other end of the duct is connected to the outside for exhausting, so that when the water flows down from the water curtain panel 106, The blower 107 of the curtain chamber can change the moving direction of the mist paint in the air by the generated air flow, so that the mist paint flows toward the water curtain 106 as much as possible. The arrangement of the exhaust fan 107 not only allows the paint around the table 103 to be sucked into the direction of the water curtain plate 106, but is adsorbed by the water flow, enters the water, so that the air is purified, and the water can be sucked to the back chamber to be away from The table 103 prevents the adverse effects of water flow on the device. In this embodiment, the number of exhaust fans is two. Of course, other types of exhaust fans, such as one and five, may be provided according to actual conditions.

In the case of the above arrangement, the mist lacquer remains in the air filtered by the single water curtain panel 106, and since the water supplied to the water curtain panel 106 by the water tank 101 is water reused from the pool 104, the pool 104 is The remaining oil residue will be transferred to the water tank 101, and thus the water flowing down from the water curtain plate 106 will have a lot of residue. In this way, the water curtain plate 106 may be adversely affected by the flow of water, and even the water tank 101 may be blocked and the water may not flow naturally, and the water flow surface may not be formed on the water curtain plate 106, and the filtering effect may be greatly affected. The following design was carried out.

A plurality of nozzles 108 are also provided in the painting booth, and a plurality of nozzles 108 communicate with the output end of the water pump 102 through the tubes. A plurality of nozzles 108 communicate with the output end of the water pump 102. By utilizing the water flow recovered from the pool 104, the area of the water flow for adsorbing the mist paint is increased, and the adsorption force for the paint in the air is increased.

In the present embodiment, the number of nozzles 108 is twenty-four. Of course, this selection is not limited, and other numbers of nozzles 108, such as ten or thirteen, may be selected.

The water spray ports of the twenty-four nozzles 108 all face the pool 104. The spout of the nozzle 108 faces the pool 104, reducing the likelihood that water will fall into the pool 104 and splash or create a mist. Of course, it is also possible to set the water spout of the nozzle 108 to face away from the pool 104.

The nozzles 108 are all fan-shaped nozzles. The fan nozzle has a flow guiding plane, and the water jetted by the fan nozzle can form a relatively stable water flow surface. Of course, other nozzles, such as nozzles that eject the water column, can also be used.

Twenty-four fan-shaped nozzles are disposed on the rear side of the painting booth, and twenty-four fan-shaped nozzles are sequentially arranged in the lateral direction, and the water flow surface formed by the water of the twenty-four fan-shaped nozzles intersects with the water flow surface formed by the water flowing down from the water tank 101. The water jets from the fan nozzles flow from the water flow surface with a smaller area, and the twenty-four fan nozzles are arranged horizontally on the basis of the width of the rear side of the spray booth, and the jetted water streams will jointly form a large water flow plane, which is a flat plane. The spray width range is greater than the width of the water flow flowing down the water curtain plate 106, and the water flow plane intersects the water flow plane of the water curtain plate 106, which is equivalent to the intersection of the two faces, and the facets intersect to form a concave water curtain wall, and the concave angle is 120 degrees. The water curtain wall cuts off the studio and the back room, and tightly blocks between the studio and the back room to absorb the spray paint.

The pool 104 is provided with a filter 109 for filtering the water entering the water pump 102. The filter 109 is not a flat filter, but is equivalent to a box, the box Each side is a meshed filter plane. The input end of the water pump 102 communicates with the pool 104 through a pipe, and a filter tank is disposed between the joint and the filter 109. It can also be said that the filter 109 separates the pool 104, and a small space is separated before the pipe. This small space is the space of the filter pool. The filter 109 is capable of filtering impurities having a larger particle size in the pool 104, preventing impurities from entering the inlet of the water pump 102 to block the inlet of the water stream, and also avoiding possible damage to the water pump 102 due to the entry of impurities.

The connection between the input end of the water pump 102 and the pool 104 is set as a water pump inlet, and the paint washing device further includes a return pipe 110. One end of the return pipe 110 communicates with the output end of the water pump 102, and the other end is a free end, and the other end of the pipe The port is disposed above the water inlet of the water pump 102 for flushing away impurities at the water inlet of the water pump 102. The return pipe 110 is located above the filter tank, and the nozzle is aligned with the outer edge of the water inlet of the water pump. The water flow recovered by the water pump 102 is used to wash the outer edge of the water inlet of the water pump to prevent impurities and oil particles with small particle size from entering the water pump 102. This also avoids clogging of the water pump 102.

The paint washing device is provided with a filter 109 at the water inlet of the water pump. After the water pump 102 sucks in water, it is divided into three directions, a water tank 101 connected to the water curtain plate 106, a pipe connected to the nozzle 108, and a part of the water guided. To the return pipe 110, the pipe diameter of the return pipe 110 is smaller than the pipe diameter of the pipe connected to the water inlet of the water pump, so that the impact force at the water inlet of the water pump is stronger.

When the first road water delivers water to the water tank 101, the position of the water tank 101 is adjusted, and the water in the water tank 101 is overflowed. The opening of the water tank 101 naturally flows down the water curtain plate 106 to form a water curtain, that is, the water flow surface; the second road The water is sent to the twenty-four nozzles 108, and the plurality of nozzles 108 spray the water flow plane to form a large-area water curtain, which is connected to the water flow surface formed by the water flowing down from the water curtain plate 106 at 120 degrees, so that the oily residue passing through, The lacquered air can be filtered through the concave water curtain wall formed by the two to achieve the best filtration condition; the third water is sent to the return pipe 110, sprayed through the nozzle, the filter 109 installed in front of the water inlet of the pump is the first line of defense against impurities, and the return pipe 110 is the second line of defense. When the oil floating on the surface of the water enters the filter pool, floating Before the second line of defense, due to the cohesive force of the oil itself, using the strong water column of the return pipe 110, the oil and debris at the water inlet of the pump can be washed away, under the action of the surface tension of the pipe and the impact force of the return pipe 110. The oil is not easily approached to the water inlet of the water pump, so the water sucked by the water pump 102 is relatively clean water, so that the nozzle 108 and the water tank 101 are not easily blocked, the filtering effect is good, and the return water pipe 110 blocks the oil and cleans it up. More convenient.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the present invention, and various modifications and changes can be made in the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and scope of the present invention are intended to be included within the scope of the present invention.

101‧‧‧Sink

103‧‧‧Workbench

104‧‧‧ pool

105‧‧‧Shell baffle

106‧‧‧Water curtain

107‧‧‧Exhaust fan

108‧‧‧Nozzles

109‧‧‧Filter

Claims (6)

A painting water washing device comprises a water tank, a water pump, a work table, a water tank and a casing baffle, and the water pool and the outer casing baffle together form a spray booth, the work table is arranged above the water tank, the water tank Provided above the workbench, the water tank is provided with an opening for facilitating the flow of water to a water tank, the water tank is connected with the output end of the water pump, and the input end of the water pump is connected with the water pool; wherein the paint booth is further provided with a plurality of a plurality of nozzles, wherein the plurality of nozzles are in communication with the output end of the water pump, wherein the nozzles are all fan-shaped nozzles; wherein the plurality of fan-shaped nozzles are disposed on a rear side of the paint booth, the plurality of fan-shaped nozzles are sequentially arranged, and The water flow surface formed by the water of the plurality of fan-shaped nozzles intersects with the water flow surface formed by the water flowing down the water tank; wherein the connection between the input end of the water pump and the water pool is set as the water inlet of the water pump, and the paint washing device further comprises a water washing device a return pipe, one end of which is connected to the output end of the water pump, the other end is a free end, and the other end of the pipe is disposed at the water inlet of the water pump Side, for the pump inlet washed from impurities. The paint washing machine according to claim 1, wherein the paint booth is further provided with a water curtain plate connected to the opening for guiding the water flow to form a water flow surface. The paint washing machine according to the second aspect of the invention, wherein the water curtain plate is an arc-shaped water curtain plate, and the water curtain plate is convex toward the table. The paint washing device according to the third aspect of the invention, wherein the water curtain plate divides the spray booth into a working chamber and a back chamber, the working chamber is in communication with the screen back chamber, and the working table is located in the work In the room, there is an exhaust fan in the back room. The paint washing machine according to the first aspect of the invention, wherein the water jets of the plurality of nozzles face the pool. The paint washing machine according to the first aspect of the invention, wherein the water tank is provided with a filter for filtering water entering the water pump.